Nerdy humorist John Hodgman, who plays a bumbling PC in Apple commercials, will get a chance to rub shoulders with nerdy billionaire Bill Gates on Monday, January 29. That's when Gates will be appearing on Jon Stewart's The Daily Show, where Hodgman is the "Resident Expert." Geeks will be looking forward to seeing whether Gates and Hodgman combine to create some kind of nerdy critical mass. Valley flacks will be marveling at Microsoft's ability to get prime exposure just one hour before Vista goes on sale at midnight.